The Philadelphia City Schools engaged in a four-year program to develop and test dual audio television, a way to help children learn more from the massive amounts of time they spend watching commercial television. The format consisted of an instructional radio broadcast which accompanied popular television shows and attempted to clarify and amplify the vocabulary concepts that were presented. To assist the writers and announcers of the dual broadcasts, a manual was developed which emphasized relevant learning theory and demonstrated practical techniques to bridge the middle ground between what is immediately obvious in the television broadcast and some more generally useful educational information. The manual lists basic pedagogical principles and illustrates how these principles should be exercised within the constraints of commercial productions. (EMH)